CO0052918 - Laserfiche WebLink

Home Browse Search

Soil Investigations for Data Collection in the Delta Initial Study/Proposed Mitigated Negative Declaration 31 • San Joaquin Valley Air Pollution Control District (SJVAPCD), • San Joaquin Valley Air Basin (SJVAB), and • Yolo-Solano Air Quality Management District (YSAQMD). National Ambient Air Quality Standards (NAAQS) and California Ambient Air Quality Standards (CAAQS) have been established for the following criteria pollutants: carbon monoxide (CO), ozone (O3), sulfur dioxide (SO2), nitrogen dioxide (NO2), particulate matter less than 10 microns (PM10), particulate matter less than 2.5 microns (PM2.5), and lead (Pb). These standards have been established with a margin of safety to protect the public’s health. Both the U.S. Environmental Protection Agency (EPA) and the California Air Resources Board (CARB) designate areas of the state as attainment, nonattainment, maintenance, or unclassified for the various pollutant standards according to the federal Clean Air Act (CAA) and the California Clean Air Act (CCAA), respectively. An “attainment” designation for an area signifies that pollutant concentrations did not violate the NAAQS or CAAQS for that pollutant in that area. A “nonattainment” designation indicates that a pollutant concentration violated the standard at least once, excluding those occasions when a violation was caused by an exceptional event, as identified in the criteria. A “maintenance” designation indicates that the area was previously non-attainment and is currently attainment for the applicable pollutant; the area must demonstrate continued attainment for a specified number of years prior to re- designation as an “attainment” area. An “unclassified” designation signifies that data do not support either an attainment or nonattainment status. The attainment status for the jurisdictional Air Quality Management Districts is shown in Table 2.